An Old man was having a calm walk when he happens to pass a brothel.
One of the prostitutes calls out: "Hey Grandpa! Why don't you try ?
The Old man replies: "No, my child, I cannot!".
The prostitute says: "Cheer up, Let us try..!
The Old man enters and performs like a 25 yr old.
The Prostitute says : "Oh Gosh! And you still say you cannot".
The Old man replies: - "Aah, sex I can, what I cannot is - pay!"